Variable-speed motor-controlling apparatus.



A. SUN DH.

. VARIABLE SPEED MOTOR CONTROLLING APPARATUS.

APPLICATION FILED MAR. 13, 1908.

1,005,355, V V Patented Oct. 10, 1911.

2 SHEETS-SHEET 1.

A. SUNDH.

VARIABLE SPEED MOTOR CONTROLLING APPARATUS.

APPLICATION FILED MAR 13, 1908.

Patented Oct. 10, 1911.

2 SHBETS'SHBET 2.

QQilncnaca w 5111201110:

. 1 1921/4 (I 3721 H L 4M7 11 11// sooner ;zen of the United rigour OFFICE.

i-TZUlllllEl-Q GE i'fililfilllliig lfilw YORK, ASSIGNOR lll) GEMS ELEVATOR COMPANY,

CIE'EY, NEW JEESEY, A CORPORATION OF JERSEY.

YMMAHLE-SEEED MOTOR-CONTROLLING APBARATUS.

To all whom may oomtem:

lie it known that l, AUoUsT SUNDH, s citi- Ststes, residing in Youlrcrs, iii the county of -l r estchester and State of lil ei-r Yorlifl; ha e invented a new and useful Improvement in Variable-Speed Motor- I Controlling Apparatus, ofwhich the following is u QlllCFJtlOH.

My on relates to motor-controlling apps s end one of its objects is the provisiorroi llllifillS for controlling the accelerotion oi 2i motor by current from a generator running with the motor. v

A further object oiE'th-e present invention is to provide in combination with a generaior, running with. (he molor, and means for controlling the sterling and acceleration of the motor, or manual switch to coutrol'the variation of speed of" the motor.

Auot r object of the present invention the novison of a generator to retard the speed of s 2 tor and means for varying the retardutizui in itfj liirrilfii'i jg 'WliZh the change of dos .l, Y

(ll-her objects of the present invention will appear hereinafter, the novel combinations of elements being forth in the appended claims. I

In the accompanying drawings, Figure l represe i diagrammatically on electric elerotor system with my invention applied thereto; and Fig. is o diagraul'innzilie illustrillion of electric elevator system including u modification of my invention.

Referring to Fig, i, it will be seen that it our 1 is connected by means of the cable l 'to the hoisting drum ll of the hoisting uppurutue P; said cable passing over the sheaves end i. A drum. counterweight W is connected by means of the cable'il passing over the sheave 5 to the drum l).

M designates a motor which is directly connected to the gearing 11 of the hoisting apparel-us. I

S designates a manual variable speed-eonlrolling switch in the car, B the brake appurutus associated with the motor shaft, ll, ll;

the reversing switches, Y the starting resiste ence 'imd G a direct eurrent generator connected to run With the motor and to supply current to the accelerating apparatus:

Syecification of Letters rarest.

Application filed March 13, 1908. filerial No. 420,831.

Patented Oct. 10, 1911.

The brake eppereus B comprises an alternating current electromagnet 4:8 for releasing the brake and a direct current magnet 9 for holding said broke in released position.

- 6 designates the brake pulley and 7'tl1e brake bend.

The generator G is in this instance connecbed to run with the motor by, means of the pulleys 8 and 10 andthe belt 9.

The starting resistance Y is connected to the slip rings 12 of the alternating current motor M by means of the loads 13, '14-, 15, these leads being connected directly to the outermost tern'iinals 16, 17 end 18 of said resistance. This sturting resistanceis made sectional and connected at various points to the fixed contacts of the accelerating switches 19, 20, 21 and 222. These switches are adepted to be closed by means of the electromagnets 523, 24:, 25 and 26, respectively. The magnet 23 will in this inslenoe operate first and then the others insucoessiori, this being indicated by the variation in the number of windings of said electro-meguets; The solenoids of these clectromiagncls are connected in mrsllel and therefore the magnet having the greatest number of ampere turns, in this nstance that designuted 23, Will be the first to operate. The accelerating magnets also control the normally closed switches 27, E28, 29 and 30 which are respegtively connected to the resistances 31, "Q, 83 and 34, the latter being ur-- 1l1"*\l in parallel between the leads .85

5v and so of the direct current generator G.

This generator may lie series or shunt Wound,

armature reversed so that the current through the field windings may always be in the some direction. The means for roe yersmg llio field connections 15 not shown,

as it is old and well known in the art. Preferulily, however, l employ a series Wound generator having its poles pcri'nnnently magnetized so that upon starting it will generate current quickly. It should be noted also that the resistances 31, 32, 33 and. 34: being arranged in parallel instead of in serie the externet resistance of the gee age is obtained'for operating the switfn l9 a short time after the 1' otor M starts. Then as the motor M increases in speed, the vottege of the generator G will also increase to effect the successive ope ration 0f the switches 1 E30, 21 am} Furthermore. upon the closing 0}? switch 19 the switch Q? is opened thereby cutting out the resistance 31. The resistances 32, 33 and 3 are then cut cut by the switches- Q8, 29 and 3G, respeetively but when this scours the circuits through the holding magnets or 4!" and 70 will heme been closed.

T designates a; trensfermer for reducing; the potential of the multiphase alternating eurrent to be conducted. through the main lineswi tch L am the leads a, b, cfihe lead 6 being connecte directly to the motel", and the leads a and c to the reversing switches R, R, which in turn are connected by Way of the leads 38 and 39. t0 the other meter terminals 3?. The alternating eurrentmagmts for releasing the brake and for clesing the reversing switches are preferably singlephase 'n'lagnets connected ecress' any two of primary circuit leads of the motor.

It the switch S in the car (1 is operated by moving the handle H in the direction of the arrow e, the bridge piece will engage the segment 51 end-thereupon single-phase uircui; will be cheer Whieh may be traced from the main Z through. the Wire 57, e011- tzrct bridge piece 53, segment 51" Wire 65, me net 46 and Wires 6% 60, t0 point 61 (m the'main -Ti1e armature wilt be attmeteci by the magnet 416% wave the contectee.rrying lever iCflto its ctr-- suit closing pesitien against the fgaetion of the spring &1. This lever 40 is gjivotecl at 4:3 and nermzflty lies against the adjustable 45 stop 45?. Wimn the switch R is thus closed the magnet W111 be energized to release the 303. 2 re Substentiaiiy at the same time er a, she. time ajk'ter the bridge. piece 53 001?.-

the segments and 51, the bridge piece engages the segment 67 to connect the same with the segment 5 A direct cur rent circuit is thereby closed from the generator G through the Wire 35, segment 56, bridge piece 54, segment 57, Wire 68, magnet H, Wire T3 Wire (54- a'nd thence back-t0 the generator-G thrmagh the Wire 36. A shunt circuit else ales-ed threugh Wire 69, magnet solenoid Z0, Wire 7 1, and the Contact 72 to the return Wire When switch R is closed the armature 415 is moved up against the po ies at the magnet 45? and when the magnet 4? mm 4-9 are energized by direct em 4t they will respective; 1 hold t 1e switch 111 closed position and the brake mergeee released,

and operate only reason that at t; maintaiaeri in meter. Uriel-11 further :1; die H, hewever, 5e the segment $105365 throw the magnet rros'ure of t emit sivety 115 in speed. This 6 "'e by Way time the n'mtc'r can stz p 3 (LIME.

of e and t'.

mag

A shrmt circuit because they are When the switch in the ear is; stit ape-rated, a circuit will be closet} f'LOi' 35, through segment 56 bridge pie segment 84;, Wires 85 and 86, nmgnet .4] Wire to Wire magnet 26. and wire to v the etectrows vets mm 1'25 W energized to attest emeessire sure of t s .tches evident that by morn j that bridge pies 5e from the segment- Bt, the. m2: Wifi be deE-Energize to efieet r the switches 21 and 552, therebw the speefl at the met-er. The switches 19 20 may beopened in the same manner eperz't e the meter at its slewest speed we fii out stepping it The (3" may be so eonsstrueted not only t0 furnish current fer operating the accelerzttimg it ppuv at and fer hair the brake released mm the reversing SVVMJC closed, but else t9 net I an tor M in reduefing its speed.

1 b er msmnzae if the motor M has been. brought up to -em0unt Qt inertia, which Weu'hi t be overceme by the simple startin resistrmee Y; ailei since it )sired t stop the wa E she-1115i net be applied.

that t resistances be so deeignert'zrs te cor switch "(he car oily be brought the generator G may he so ElGSlgilQiil as 'to have suiiicicn'r dynamic broking efii'eei; 10 bring the motor and car to rcs'r or nearly so in order that the brake B may bfidfifi filltlld upon merely to hold lhe motor and ear 'tionary. Therefore by iounipulo on of the to rest gradually Without shock or jar and then held from lnoviiig While pessengersare passing intoor out of the car.

is obvious i hst various changes in the details and. arrangement ofperis may be diode by hose sh lled iii the or- Wiihout parting from the motion as defined by the cieiins. I desire therefore not lo be limited ie the precise construction he -i1 disclosed.

filming thus fully clescribeii my invention, What 1 cl: mend desire to have protected by Letters .2 elem ol the .UH' fled Stores is:

' l. The comhiimtion with an alternating current induction motor, of sterling resistance ll'ierefor, a direct current generator connected in the roior, and aulzomatic ,ineens for suls iii'tiolly sin'iulisiieously varying said slorl a resistance and the current 19lochiced by hie generator to 995601; a reisrcle (ion of the motor in proportion to its speed.

The combination "with an alternating; current molor, of starting resisliance there for, accelerating switches for controlling said resislmice, a direct currentgenerator running with the motor, magnets opere'l'eol by the generator current for closing ssirl celeraling switches successiw end 2 cowering wii'l: semi eleciii switches for causing suirl generator to in reducing the speed of the motor.

3. The coinhii )ll u'iih an elevator car i ipziratus. lhei. "or, oil an elec-. motor, conuucflors leading from 9. source f (fllll'Pnl/ for said motor, a second sourceof chi. separate from, but dependeni; upon said molor, and automatic means controlled from (he car for re ulaliin -the retarding '3 b is,

@Jflm; of soul second source suicl motor in proportion motor.

%. The combination Wi of current upon to the speed of {he means dependent on the current strenglhof the generaior for varying the speed of the mol'or, owl app iances for auloumt-icelly varying the resislisiice in the generator circuit upon the operalion of seicl speechvsr ing mes 11s.

spirit and scope of my iiil'h motor, of. :1 genernl'or connected. to run with the motor,

ed. to run with tarring resistance in more oils dependent upon ill current of the gene-rotor for varying said snail ienccs for automatically .ic the geiierzitor Cllflill:

resis Juice is varied.

7. The cooler generator mechanically connect-edstarting resisisoce she motor led loy 0 very saucl i l" w uiffilllh the generator sistei ce is 8. 4,; u moior, of generator ii echeriicelly connected r0 run therewith, resistances in ilie motor and 'or a; "cults, end means controlled ..1

I creior substantially SlHllllhiiIlQOL... z'eryiizgf said resistances. 5: 5

9. The combination with a motor, a generator mechanically connected to run therewich, resistances in the moi'or and geoerator circuits, and means depezirleiifi on l-liiii iroltoge in the generator circuit for sii'n'u. 9i: toneously varying saicl ist suoes.

The Cfliillflil'ii'iIiOIl i 511 a ree generator meclioiiicell counsel-eel smiling resislaiicc iii the iiieeiis (lepeuclei upoifs the i for varying s'eicl s s'oplieiices for a n c generator szzicl'ia generator c and 1e eomhii'ietion with M .i cor. o for iiie ionicelly conneciiefl l-hc I resic .nee in. motor menus. dependent upon generator for Varying resis nice, one,

easing 1e appliances for automatically (leer voltage oi ihe generator as sairl smiling resistance is decreased.

12. The combination with on elicrnafiing current 3110tOl", 0f clirece current generator, connected. to film therewith, a sectional resislsnce in s circuit of the motor, means op: eraieil by current from. too generator to vary ssicl resistance, and.- epplieinces for vs rying the voltage of the generator simultaneously with rhevariation oi? said resistance.

13. The comhi -olioii. with e motor, of o geoemior counecie'o. lo run therewith, Lionel resistance in a circuit of the motor, manually coiiiirollecl means for varying resistance, encl appliances controlled by the generator for varying the voltage of the generator circuit substantially ssiii resistance is varied.

neously increasing the resistance in the mo,

tor circuit and decreasing the resistance in the generator circuit, or decreasing the resistance in the motor circuit and increasing the resistance in the generator circuit.

16. The combination with a motor, of a generator connected to run with the motor in opposition thereto, manually contmlled means dependent upon the voltage of the generator, for efiecting a. variation in the speed of the motor, and devices associated with said means and operative to respec tively increase or decrease the opposing ac tion of the generator as the speed of the motor is decreased or increased.

17. The combination with a motor, of a resistance in the motor circuit, a generator connected to run with the motor, resistances in the generator circuit, switches controlling said resistances,and an electro-magnet connected to each of said switches and having its winding in the generator circuit.

18. The combination with a motor, of a generator connected to run with the motor, resistances in.the motor circuit, resistances in the generator circuit, switches controlling said resistances, electro-magnets operatively connected to the switches and having their windings in the gene 'ator circuit, and manual means for successively opening or closing the circuits of the magnet windings.

19. The conihiinition with a motor, of a starting resistance in a circuit of the motor, a direct current generator connected to run with the motor, means dependent upon the voltage of. the generator for gradually cutting out the starting resistance as the speed increases and appliances for gradually increasing the resistance of the generator circuit as the starting resistance is decreased.

20. The combination with a motor, of a generator, a starting resistance in the motor circuit, means operated by current from the generator to vary said resistance, and means for varying the resistance in the generator circuit as said starting resistance is varied.

21. The combination with a motor, of a generator connected thereto, a starting re sistance in the motor circuit, means operated by current from the generator to vary said resistance, and appliances for varying the resistance-in the generator circuit as said starting resistance is varied.

In testimony whereof, I have signedmy name to this specification in the presence of two subscribing witnesses.

aucns'r snnnrz.

Witnesses N. H. BRADY, CHAS. M. NISSEN. 

